/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.mpp.metric;

import org.apache.iotdb.commons.service.metric.MetricService;
import org.apache.iotdb.commons.service.metric.enums.Metric;
import org.apache.iotdb.commons.service.metric.enums.Tag;
import org.apache.iotdb.metrics.utils.MetricInfo;
import org.apache.iotdb.metrics.utils.MetricLevel;

import java.util.concurrent.TimeUnit;

import static org.apache.iotdb.db.mpp.metric.DataExchangeMetricSet.GET_DATA_BLOCK_NUM;

public class QueryMetricsManager {

    private final MetricService metricService = MetricService.getInstance();

    public void recordPlanCost(String stage, long costTimeInNanos) {
        metricService.timer(
                costTimeInNanos,
                TimeUnit.NANOSECONDS,
                Metric.QUERY_PLAN_COST.toString(),
                MetricLevel.IMPORTANT,
                Tag.STAGE.toString(),
                stage);
    }

    public void recordOperatorExecutionCost(String operatorType, long costTimeInNanos) {
        metricService.timer(
                costTimeInNanos,
                TimeUnit.NANOSECONDS,
                Metric.OPERATOR_EXECUTION_COST.toString(),
                MetricLevel.IMPORTANT,
                Tag.NAME.toString(),
                operatorType);
    }

    public void recordOperatorExecutionCount(String operatorType, long count) {
        metricService.count(
                count,
                Metric.OPERATOR_EXECUTION_COUNT.toString(),
                MetricLevel.IMPORTANT,
                Tag.NAME.toString(),
                operatorType);
    }

    public void recordSeriesScanCost(String stage, long costTimeInNanos) {
        MetricInfo metricInfo = SeriesScanCostMetricSet.metricInfoMap.get(stage);
        metricService.timer(
                costTimeInNanos,
                TimeUnit.NANOSECONDS,
                metricInfo.getName(),
                MetricLevel.IMPORTANT,
                metricInfo.getTagsInArray());
    }

    public void recordExecutionCost(String stage, long costTimeInNanos) {
        MetricInfo metricInfo = QueryExecutionMetricSet.metricInfoMap.get(stage);
        metricService.timer(
                costTimeInNanos,
                TimeUnit.NANOSECONDS,
                metricInfo.getName(),
                MetricLevel.IMPORTANT,
                metricInfo.getTagsInArray());
    }

    public void recordQueryResourceNum(String type, int count) {
        metricService.histogram(
                count, Metric.QUERY_RESOURCE.toString(), MetricLevel.IMPORTANT, Tag.TYPE.toString(), type);
    }

    public void recordDataExchangeCost(String stage, long costTimeInNanos) {
        MetricInfo metricInfo = DataExchangeMetricSet.metricInfoMap.get(stage);
        metricService.timer(
                costTimeInNanos,
                TimeUnit.NANOSECONDS,
                metricInfo.getName(),
                MetricLevel.IMPORTANT,
                metricInfo.getTagsInArray());
    }

    public void recordDataBlockNum(int num) {
        metricService.histogram(
                num,
                Metric.DATA_EXCHANGE_COUNT.toString(),
                MetricLevel.IMPORTANT,
                Tag.NAME.toString(),
                GET_DATA_BLOCK_NUM);
    }

    public void recordTaskQueueTime(String name, long queueTimeInNanos) {
        metricService.timer(
                queueTimeInNanos,
                TimeUnit.NANOSECONDS,
                Metric.DRIVER_SCHEDULER.toString(),
                MetricLevel.IMPORTANT,
                Tag.NAME.toString(),
                name);
    }

    public static QueryMetricsManager getInstance() {
        return QueryMetricsManager.QueryMetricsManagerHolder.INSTANCE;
    }

    private static class QueryMetricsManagerHolder {

        private static final QueryMetricsManager INSTANCE = new QueryMetricsManager();

        private QueryMetricsManagerHolder() {
        }
    }
}
